/* ===================================
   CSS RESET & BASE STYLES
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - AI/ML Professional Theme */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #111118;
    --color-bg-tertiary: #1a1a24;
    --color-bg-card: rgba(255, 255, 255, 0.03);
    --color-bg-card-hover: rgba(255, 255, 255, 0.06);
    
    /* Gradient Colors */
    --color-blue: #3b82f6;
    --color-blue-light: #60a5fa;
    --color-purple: #9333ea;
    --color-purple-light: #a855f7;
    --color-teal: #14b8a6;
    --color-teal-light: #2dd4bf;
    --color-pink: #ec4899;
    --color-green: #10b981;
    
    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: #e5e7eb;
    --color-text-tertiary: #9ca3af;
    --color-text-muted: #6b7280;
    
    /* Border & Shadow */
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-hover: rgba(255, 255, 255, 0.2);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow-blue: 0 0 40px rgba(59, 130, 246, 0.3);
    --shadow-glow-purple: 0 0 40px rgba(147, 51, 234, 0.3);
    --shadow-glow-teal: 0 0 40px rgba(20, 184, 166, 0.3);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   LOADING SCREEN
   =================================== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    position: relative;
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loader-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-top-color: var(--color-blue);
    border-radius: 50%;
    animation: spin 2s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
}

.loader-ring:nth-child(2) {
    width: 80%;
    height: 80%;
    border-top-color: var(--color-purple);
    animation-duration: 1.5s;
    animation-direction: reverse;
}

.loader-ring:nth-child(3) {
    width: 60%;
    height: 60%;
    border-top-color: var(--color-teal);
    animation-duration: 1s;
}

.loader-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    font-weight: 600;
    letter-spacing: 0.05em;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ===================================
   NAVIGATION HEADER
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: transform 0.3s ease, background 0.3s ease;
}

.header.scrolled {
    background: rgba(10, 10, 15, 0.95);
    box-shadow: var(--shadow-lg);
}

.header.hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.logo-pulse {
    width: 8px;
    height: 8px;
    background: var(--color-teal);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all 0.3s ease;
    border-radius: 2px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translateY(10px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-10px);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    color: var(--color-text-tertiary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    letter-spacing: 0.02em;
    position: relative;
    padding: 0.5rem 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-blue), var(--color-purple));
    transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 73px;
        left: 0;
        width: 100%;
        flex-direction: column;
        gap: 0;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(12px);
        padding: 1rem 0;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu li {
        padding: 0;
    }
    
    .nav-link {
        display: block;
        padding: 1rem 1.5rem;
        border-bottom: 1px solid var(--color-border);
    }
}

/* ===================================
   HERO SECTION
   =================================== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, 
        rgba(10, 10, 15, 0.8) 0%, 
        rgba(10, 10, 15, 0.6) 50%, 
        var(--color-bg-primary) 100%);
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 1280px;
    margin: 0 auto;
    padding: 8rem 1.5rem 4rem;
    text-align: center;
}

.hero-name {
    margin-bottom: 1.5rem;
}

.name-text {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.hero-tagline {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-tertiary);
    max-width: 800px;
    margin: 0 auto 2rem;
    line-height: 1.8;
}

.hero-social {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-tertiary);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.social-link:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-blue);
}

.hero-ctas {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    animation: bounce 2s ease-in-out infinite;
}

.mouse {
    width: 28px;
    height: 44px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 8px 0;
}

.wheel {
    width: 4px;
    height: 8px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 2px;
    animation: scroll 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(10px);
    }
}

@keyframes scroll {
    0% {
        transform: translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateY(10px);
        opacity: 0;
    }
}

/* ===================================
   BUTTON STYLES
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-weight: 600;
    font-size: var(--font-size-base);
    text-decoration: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    border: none;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn svg {
    transition: transform var(--transition-normal);
}

.btn:hover svg {
    transform: translateX(3px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-purple) 100%);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    box-shadow: var(--shadow-xl), var(--shadow-glow-blue);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(12px);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

.btn-accent {
    background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-blue) 100%);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-lg);
}

.btn-accent:hover {
    box-shadow: var(--shadow-xl), var(--shadow-glow-teal);
    transform: translateY(-2px);
}

/* ===================================
   TYPOGRAPHY & GRADIENTS
   =================================== */
.gradient-text {
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-purple) 50%, var(--color-teal) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text-blue {
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text-purple {
    background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-pink) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text-teal {
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-teal) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text-green {
    background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight-blue {
    color: var(--color-blue-light);
    font-weight: 600;
}

.highlight-purple {
    color: var(--color-purple-light);
    font-weight: 600;
}

.highlight-teal {
    color: var(--color-teal-light);
    font-weight: 600;
}

.text-highlight-blue {
    color: var(--color-blue-light);
    font-weight: 600;
}

.text-highlight-purple {
    color: var(--color-purple-light);
    font-weight: 600;
}

.text-highlight-teal {
    color: var(--color-teal-light);
    font-weight: 600;
}

/* ===================================
   SECTION STYLES
   =================================== */
.section {
    position: relative;
    padding: 6rem 0;
    overflow: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
    position: relative;
    z-index: 10;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-tertiary);
    max-width: 700px;
    margin: 0 auto;
}

.section-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.15;
}

.section-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, 
        transparent 0%, 
        var(--color-bg-primary) 100%);
}

/* ===================================
   ABOUT SECTION
   =================================== */
.about-section {
    background: linear-gradient(180deg, 
        var(--color-bg-primary) 0%, 
        var(--color-bg-secondary) 100%);
}

.about-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.about-content {
    display: grid;
    grid-template-columns: 300px 1fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
    align-items: start;
}

.about-profile {
    position: relative;
    width: 100%;
}

.profile-image-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    border: 3px solid var(--color-border);
    background: linear-gradient(135deg, 
        rgba(59, 130, 246, 0.1) 0%, 
        rgba(147, 51, 234, 0.1) 100%);
    box-shadow: var(--shadow-2xl), 0 0 40px rgba(59, 130, 246, 0.2);
    transition: all var(--transition-normal);
    overflow: hidden;
    isolation: isolate;
}

.profile-image-wrapper:hover {
    transform: translateY(-5px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-2xl), 0 0 50px rgba(59, 130, 246, 0.3);
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;

    image-rendering: auto;
    backface-visibility: hidden;
    transform: translateZ(0);
}

/* Profile Leadership Badge */
.profile-badge {
    position: relative;
    display: flex;
    align-items: center;
    gap: 1rem;
    background: linear-gradient(135deg, 
        rgba(59, 130, 246, 0.08) 0%, 
        rgba(147, 51, 234, 0.08) 100%);
    border: 1px solid rgba(59, 130, 246, 0.3);
    backdrop-filter: blur(8px);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-xl);
    margin-top: 0.75rem;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.1);
    transition: all var(--transition-normal);
}

.profile-badge:hover {
    background: linear-gradient(135deg, 
        rgba(59, 130, 246, 0.12) 0%, 
        rgba(147, 51, 234, 0.12) 100%);
    border-color: rgba(59, 130, 246, 0.5);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.2);
}

.badge-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.badge-icon svg {
    width: 24px;
    height: 24px;
    stroke: white;
    stroke-width: 2;
}

.badge-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.badge-role {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-text-primary);
    margin: 0;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.badge-org {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.2;
    font-weight: 500;
}


/* Placeholder for profile image */
.profile-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 1rem;
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
    text-align: center;
    padding: 2rem;
}

.profile-placeholder svg {
    width: 80px;
    height: 80px;
    opacity: 0.3;
}

.about-heading {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1.5rem;
}

.about-text {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.expertise-cards {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.expertise-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: all var(--transition-normal);
}

.expertise-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.expertise-title:nth-child(1) {
    color: var(--color-blue-light);
}

.expertise-card:nth-child(2) .expertise-title {
    color: var(--color-purple-light);
}

.expertise-card:nth-child(3) .expertise-title {
    color: var(--color-teal-light);
}

.expertise-text {
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.highlight-card {
    background: linear-gradient(135deg, 
        var(--color-bg-card) 0%, 
        rgba(255, 255, 255, 0.01) 100%);
    backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: all var(--transition-normal);
}

.highlight-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    transition: transform var(--transition-normal);
}

.icon-brain {
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-purple) 100%);
}

.icon-target {
    background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-pink) 100%);
}

.icon-award {
    background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-blue) 100%);
}

.highlight-card:hover .highlight-icon {
    transform: scale(1.1) rotate(5deg);
}

.highlight-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
}

.highlight-text {
    color: var(--color-text-tertiary);
    line-height: 1.6;
}

/* Card Hover Effects */
.card-hover {
    transition: all var(--transition-normal);
}

.card-hover:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-5px);
    box-shadow: var(--shadow-2xl), 0 0 30px rgba(59, 130, 246, 0.15);
}

/* ===================================
   SKILLS SECTION
   =================================== */
.skills-section {
    background: linear-gradient(180deg, 
        var(--color-bg-secondary) 0%, 
        var(--color-bg-primary) 100%);
}

.skills-background {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    max-width: 1000px;
    height: auto;
    opacity: 0.08;
    z-index: 0;
    filter: blur(2px);
}

.skills-bg-img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.skill-category {
    background: rgba(17, 24, 39, 0.85);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.skill-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    transition: transform var(--transition-normal);
}

.skill-category:hover .skill-icon {
    transform: scale(1.1) rotate(5deg);
}

.skill-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1.5rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    display: inline-block;
    padding: 0.5rem 0.75rem;
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

/* ===================================
   PROJECTS SECTION
   =================================== */
.projects-section {
    background: linear-gradient(180deg, 
        var(--color-bg-primary) 0%, 
        var(--color-bg-secondary) 100%);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.project-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.project-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-2xl), 0 0 40px rgba(147, 51, 234, 0.15);
    transform: translateY(-8px);
}

.project-image {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    background: var(--color-bg-secondary);
    overflow: hidden;
}

.project-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
}

.project-content {
    padding: 1.5rem;
}

.project-name {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    transition: color var(--transition-fast);
}

.project-card:hover .project-name {
    color: var(--color-purple-light);
}

.project-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.project-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.project-detail {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.detail-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.detail-label-blue {
    color: var(--color-blue-light);
}

.detail-label-purple {
    color: var(--color-purple-light);
}

.detail-label-teal {
    color: var(--color-teal-light);
}

.detail-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    line-height: 1.5;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    padding-top: 0.5rem;
}

.project-tag {
    padding: 0.375rem 0.625rem;
    background: rgba(147, 51, 234, 0.15);
    color: var(--color-purple-light);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 1px solid rgba(147, 51, 234, 0.3);
}

.project-links {
    display: flex;
    gap: 1rem;
    padding-top: 1rem;
}

.project-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.project-btn-primary {
    background: var(--color-purple);
    color: white;
}

.project-btn-primary:hover {
    background: var(--color-purple-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.project-btn-primary svg {
    transition: transform var(--transition-normal);
}

.project-btn-primary:hover svg {
    transform: translate(3px, -3px);
}

.project-btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: white;
}

.project-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
}

/* ===================================
   EDUCATION SECTION
   =================================== */
.education-section {
    background: linear-gradient(180deg, 
        var(--color-bg-secondary) 0%, 
        var(--color-bg-primary) 100%);
}

.education-container {
    margin-bottom: 4rem;
}

.subsection-title {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 2rem;
}

.subsection-title svg {
    color: var(--color-teal);
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, 
        var(--color-blue) 0%, 
        var(--color-purple) 50%, 
        var(--color-teal) 100%);
}

.timeline-item {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 3rem;
}

.timeline-marker {
    position: absolute;
    left: -0.5rem;
    top: 0;
    width: 1rem;
    height: 1rem;
    background: var(--color-purple);
    border: 3px solid var(--color-bg-primary);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(147, 51, 234, 0.5);
}

.timeline-content {
    background: var(--color-bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    gap: 1rem;
}

.timeline-degree {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.timeline-institution {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-teal-light);
    margin-bottom: 0.25rem;
}

.timeline-location {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.timeline-period {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    white-space: nowrap;
}

.timeline-gpa {
    color: var(--color-green);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-details {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.timeline-achievement {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding-top: 0.75rem;
    margin-top: 0.75rem;
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
    color: var(--color-purple-light);
}

.timeline-achievement svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.achievements-container {
    margin-top: 3rem;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.achievement-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.achievement-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-normal);
}

.icon-award-gold {
    background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
}

.achievement-card:hover .achievement-icon {
    transform: scale(1.1) rotate(5deg);
}

.achievement-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.achievement-org {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-teal-light);
    margin-bottom: 0.5rem;
}

.achievement-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* ===================================
   CONTACT SECTION
   =================================== */
.contact-section {
    background: linear-gradient(180deg, 
        var(--color-bg-primary) 0%, 
        var(--color-bg-secondary) 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-heading {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1.5rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-item-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-email {
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-purple) 100%);
}

.icon-linkedin {
    background: linear-gradient(135deg, var(--color-purple) 0%, var(--color-pink) 100%);
}

.contact-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.contact-link {
    color: var(--color-blue-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-link:hover {
    color: var(--color-blue);
}

.collaboration-box {
    background: var(--color-bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
}

.collab-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.75rem;
}

.collab-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.collab-focus {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.focus-label {
    color: var(--color-blue-light);
    font-weight: 600;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 3rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all var(--transition-fast);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-blue);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    resize: none;
    transition: all var(--transition-fast);
}

.form-textarea::placeholder {
    color: var(--color-text-muted);
}

.form-textarea:focus {
    outline: none;
    border-color: var(--color-blue);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-submit {
    width: 100%;
    justify-content: center;
    position: relative;
}

.submit-loading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.spinner {
    animation: spin 1s linear infinite;
}

.form-message {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
}

.success-message {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--color-green);
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo {
    margin-bottom: 1rem;
}

.footer-text {
    color: var(--color-text-tertiary);
    line-height: 1.6;
    max-width: 400px;
}

.footer-heading {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
}

.footer-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-link {
    color: var(--color-text-tertiary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-text-primary);
}

.footer-social-links {
    display: flex;
    gap: 1rem;
}

.footer-social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-tertiary);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.footer-social-link:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-3px);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.footer-copyright,
.footer-built {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ===================================
   BACK TO TOP BUTTON
   =================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-purple) 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(100px);
    transition: all var(--transition-normal);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl), var(--shadow-glow-blue);
}

/* ===================================
   ANIMATIONS
   =================================== */
.animate-fade-in {
    animation: fadeIn 1s ease-out;
}

.animate-fade-in-delay-1 {
    animation: fadeIn 1s ease-out 0.2s both;
}

.animate-fade-in-delay-2 {
    animation: fadeIn 1s ease-out 0.4s both;
}

.animate-fade-in-delay-3 {
    animation: fadeIn 1s ease-out 0.6s both;
}

.animate-fade-in-delay-4 {
    animation: fadeIn 1s ease-out 0.8s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-profile {
        max-width: 280px;
        margin: 0 auto;
    }
    
    .highlights-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .achievements-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 4rem 0;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .section-header {
        margin-bottom: 2.5rem;
    }
    
    .hero-content {
        padding: 6rem 1rem 3rem;
    }
    
    .hero-ctas {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-profile {
        max-width: 250px;
        margin: 0 auto;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .timeline {
        padding-left: 1.5rem;
    }
    
    .timeline-item {
        padding-left: 1.5rem;
    }
    
    .timeline-header {
        flex-direction: column;
    }
    
    .timeline-period {
        align-self: flex-start;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-name {
        margin-bottom: 1rem;
    }
    
    .project-links {
        flex-direction: column;
    }
    
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
}